The dielectric and ferroelectric properties of (1-z) (Sr0.7Bi0.2)TiO3â€“z(Na0.5Bi0.5)TiO3 solid solutions with z=0.65â€“1 are studied. High remnant polarization of âˆ¼51 Î¼C/cm2 with a coercive field of 50 kV/cm, and a dielectric constant of âˆ¼1000 have been obtained at room temperature in the sample with z=0.9, indicating an application potential as a lead-free ferroelectric material. There are two dielectric anomalies in the temperature range of 150â€“670 K for all samples; one is the dielectric peak without significant frequency dispersion, and the other is significantly frequency dependent. The result of this work shows that the formula scheme â€œa ferroelectric relaxor+a ferroelectricâ€ for solid solutions is a promising approach in the search for high performance lead-free ferroelectric materials.

We observed the evolution of polarization states and electromechanical coupling in (1 - x) AgNbO3-xNaNbO3 solid solutions using dielectric and strain hysteresis loop techniques and show that the polarization evolves from the ferrielectric ordering in AgNbO3 to the ferroelectric ordering in...

The ferroelectric and magnetic properties of the perovskite solid solution, (1 - x) La3-xBixCrO3, have been investigated. While pure LaCrO3 does not show ferroelectric hysteresis even at 77 K, the solid solution of La1-xBixCrO3 with x = 0.1, 0.2, 0.3, and 0.35 displays ferroelectric hysteresis,...

Piezoelectric response induced by rotating the polarization, which occurs when the external field is not in the same direction as the internal spontaneous polarization, is studied using a first-principles approach. The piezo-response of the rhombohedral BaTiO[sub 3] to the field along the <001>...

In this letter, we report a micromechanical analysis to explain the enhanced piezoelectric coefficients in ferroelectric single crystals poled along a nonpolar axis, where the coexistence of several variants leads to a complicated domain configuration. The engineered domain configuration in the...

Presents a first principle study of the ferroelectric perovskite, BaTiO3, which is similar to single-crystal PZN-PT. Piezoelectric response driven by external electric field-induced polarization rotation; Characteristic of a good piezoelectric material; Manifestation of polarization rotation...